<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>history</title>
</head>
<body>
    <a onclick="push('/a', this)">push to a</a>
    <a onclick="push('/b', this)">push to b</a>
    <script>
        function push(path, e) {
          history.pushState({
            p: path
          }, null, path);        
        }

        window.addEventListener('popstate', (e) => {
          console.log(e);
        })
    </script>
</body>
</html>